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Method for preparing corrosion-resistant antibacterial polyurea composite coating

A composite coating and nano-composite coating technology, applied in the fields of botanical equipment and methods, coatings, anti-corrosion coatings, etc., can solve the problems of weakening the service life of coatings, transfer of heavy metal ions, and fragile mesoporous materials. The effect of extending service life, improving hardness and abrasion resistance, and improving antibacterial ability

Inactive Publication Date: 2013-12-11
扬州龙华环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of anti-pollution and anti-corrosion coatings is a simple and effective method, but currently there is no anti-pollution and anti-corrosion coating that can effectively treat biofouling, erosion wear and electrochemical corrosion simultaneously.
[0003] Chinese patent 1478817A discloses "antibacterial elastic polyurethane nanocomposite material and its preparation method". In this patent, the inventor improves the antibacterial performance of the coating by impregnating heavy metal ions in the mesoporous material. This technology can easily lead to heavy metal ions Transferred to the environment, causing secondary pollution, and because mesoporous materials are easily broken under the action of external force, this will seriously weaken the service life of the prepared coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Preparation of component A: Put 450g of polyoxypropylene ether polyol (average functionality fn=3, relative average molecular weight Wn=5000) into the reactor, heat it up to 100°C, dehydrate under reduced pressure for 1 hour, then cool down to 78°C, Add 550g of diphenylmethane diisocyanate (MDI 100, purity greater than 98%), keep the temperature at 80°C, and react for 2h. This results in an isocyanate-terminated prepolymer, Part A.

[0020] Among them, isocyanates include PAPI (multiple tetramethyl polyphenyl polyisocyanate), liquefied MDI (diphenylmethane diisocyanate), HDI (hexamethylene diisocyanate), IPDI (isophorone diisocyanate) and terminal isocyanate prepolymer.

[0021] Preparation of antibacterial nanopowder: Add 500ml 0.1mol / l CuCl to 100ml HCl (6mol / L) solution 2 Solution and 0.055 mol of copper powder, heated and stirred until the copper powder in the solution reacted completely, cooled to 25°C, adjusted the pH value of the solution to 2.5 with NaOH, adde...

Embodiment 2

[0025] Preparation of component A: Put 450g of polyoxypropylene ether polyol (average functionality fn=3, relative average molecular weight Wn=5000) into the reactor, heat it up to 95°C, dehydrate under reduced pressure for 1.5h, and then cool down to 80°C Next, add 550 g of isophorone diisocyanate (IPDI), keep the temperature at 75° C., and react for 3 hours. This results in an isocyanate-terminated prepolymer, the A component.

[0026] Add 500ml 0.5mol / l CuCl to 100ml HCl (6mol / L) solution 2 solution and 0.25 mol of copper powder, heated and stirred until the copper powder in the solution reacted completely, cooled to 25°C, adjusted the pH value of the solution to 2 with NaOH, added 10 g of surfactant (polyethylene glycol 400), and dissolved in ice water Add 100 ml of 0.5 mol / L NaSCN solution drop by drop under the condition of cooling and constant stirring (dropping speed is 30 drops per minute), after aging, washing, filtering and constant temperature drying at 110°C, nan...

Embodiment 3

[0030] Preparation of component A: Put 350g of polyoxypropylene ether polyol (average functionality fn=3, relative average molecular weight Wn=5000) into the reactor, heat it up to 97°C, dehydrate under reduced pressure for 1.2h, and then cool down to 50°C , add 650g of hexamethylene diisocyanate (HDI), keep the temperature at 85°C, and react for 2.5h. This results in an isocyanate-terminated prepolymer, the A component.

[0031] Add 500ml 0.25mol / l CuCl to 100ml HCl (6mol / L) solution 2 solution and 0.125 mol of copper powder, heated and stirred until the copper powder in the solution reacted completely, cooled to 25°C, adjusted the pH value of the solution to 3 with NaOH, added 8 g of surfactant (polyethylene glycol 400), and dissolved in ice water Add 100 ml of 0.5 mol / L NaSCN solution drop by drop under the condition of cooling and constant stirring (dropping speed is 30 drops per minute), after aging, washing, filtering and constant temperature drying at 110°C, nanometer ...

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PUM

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Abstract

The invention relates to a method for preparing a corrosion-resistant antibacterial polyurea composite coating, relating to a preparation method of a polymer nanometer composite coating. The method comprises the following steps of preparing a component A of the coating; preparing a component B mixed with a nanometer antibacterial agent; respectively adding the component A and the component B mixed with the nanometer antibacterial agent to spraying equipment for spraying so as to prepare the corrosion-resistant antibacterial polyurea composite coating. Compared with the prior art, the corrosion-resistant antibacterial composite coating with a metal or concrete surface, which is provided by the invention, enhances the antibacterial capacity of the polyurea coating by adding the nanometer antibacterial agent to the component B, reduces the microdefects of the coating and enhances the corrosion resistance and abrasion resistance of the coating.

Description

technical field [0001] The invention relates to a method for preparing a nano coating, in particular to a method for preparing a polymer nano composite coating. Background technique [0002] In view of the interweaving effects of biological pollution, erosion wear and electrochemical corrosion faced by ships and port facilities at sea, regular cleaning and maintenance of ships is very necessary. Even in some cases, parts need to be replaced, and this process requires a lot of money, so different countries apply different technologies to solve this problem. The application of anti-pollution and anti-corrosion coatings is a simple and effective method, but there is no anti-pollution and anti-corrosion coating that can effectively deal with biofouling, erosion wear and electrochemical corrosion at the same time. [0003] Chinese patent 1478817A discloses "antibacterial elastic polyurethane nanocomposite material and its preparation method". In this patent, the inventor improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D5/14C09D5/16C09D5/08C09D7/12A01N59/24A01P1/00
Inventor 丁龙华宋浩杰
Owner 扬州龙华环境工程有限公司
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